A .scr (screen saver) file is almost identical to an actual executale. They are oular methods of infection ecause most eole do not assume .scr files to e harmful. However, Windows is designed not to execute any code within a screen saver unless it is exlicitly executed (y the user or OS). That doesn't mean that it's imossile, however, as when you're interacting with the file (even through right-click), rocesses in your comuter have the aility to do things such as scan the contents of your file. Windows does this y itself, to gra information aout the file, and third-arty alications such as AntiVirus also use these events in order to erform random file scans. If a vulneraility is found in the way the file is read, it could lead to aritrary code execution, which allows code to e run at the same ermission level as the vulnerale software.
As a simle answer to your question; Yes, however the chances of encountering such a modern real-world attack are very slim. These exloits are extremely rare and quickly atched
How to enale screen saver for login screen?
To the est of my knowledge, it's not ossile to trigger the screensaver from the lock screen. However, you could consider triggering the screensaver instead of going to the lock screen, then changing your security settings to lock your device in the ackground as soon as the screensaver triggers.To do this, go to your Security & Privacy references in System Preferences, check the checkox next to Require assword time interval after slee or screen saver egins, and select immediately from the drodown (or 5 seconds if you want a little leewaythis setting dictates the length of time after the screensaver starts efore you'll need to ut in your assword to unlock your comuter). See the screenshot elow:Next, you'll simly need to add a shortcut to start the screensaver to your Touch Bar. As this CNET article exlains, go to System Preferences Keyoard Customize Control Stri and drag the Screen Saver control to your Touch Bar's Control Stri. From now on, instead of locking your dislay, ress the Screen Saver icon on the Touch Bar to oth lock your device (i.
e., revent access without a assword, ut without showing the login screen) and start the screensaver------
Alternative screen lock out to Xscreensaver?
I found a forum at crunchbanglinux.org on how to either modify/change Xscreensaver. Also here is a link to extra screen savers for Xscreensaver if you decide to stay with it. Included is a way to have an auto-disable script for Xscreensaver. org/forums/topic/1069/howto-configure-xscreensaver-instead-of-gnomescreensaver/ I used it a couple years ago on Ubuntu 10.10.Alright, to login to a different session instead of the auto-lock screen, I found this link which shows how to configure the settings. How do I change the default session for when using auto-logins? Anyway, here is the code:EXAMPLE: sudo nano /etc/lightdm/lightdm.
conf change the lineuser-sessionubuntu to user-sessionubuntu-2d Note - if you don't have a lightdm.conf file then for a autologin use the following values for this file: Another possibility is to run:EXAMPLE:This will also create the lightdm.conf file if it wasn't already present.Credit is due to fossfreedom for this tutorial.
Oh and one more link: ubuntu.
com/LightDM/. It's a wiki to LightDM configuration from canonical.Let me know if this was what you were looking for. I tried to make it neat and easy to read.------
Why is my computer sluggish after downloading a lot?
The RAM in a computer is useful for two things: to store the memory of programs, and as a cache of recently-used disk content. On a typical healthy desktop system, about half the memory goes into each. You can check your memory usage with the free command; the used column of the -/ buffers/cache is the figure for memory used for program data, and the buffers and cache values are the disk cache.
When you've been downloading a lot of things, this data fills the disk cache. As it does so, something else will have to go, because memory is finite. It appears that you aren't running any programs that have infrequently-used data, so no data gets written to the swap; instead, other data is evicted from the cache.
Programs are slower to open the first time after the download because you're used to the speed when the program code and data is already in the cache, but now they've been displaced from the cache to make room for the downloaded files.The download program is probably slower to close because of delayed writes: the files that it writes are buffered, and the data is only fully written to disk when the system isn't using the disk bandwidth for more important things or when the buffer memory needs to be repurposed, or by explicit request with the sync command.That you aren't seeing any swap at all is a bit strange. It suggests that you've tuned your swappiness to a value that reduces performance (swap usage is healthy, but there's a lot of advice on the web that suggests turning it off, which is almost always counter-productive)------
Launching apps behind the lock screen?
If you are happy to use a third party application, Power Manager can do exactly what you want.There are lots of recipes to help create your schedule. For your situation:By default, Power Manager will power on a sleeping Mac to perform scheduled events. The recipe above for launching an application will automatically wake a sleeping Mac. You can adjust the event to power on a shut down Mac, if desired.Power Manager will launch your application behind the lock screen. This is possible because Power Manager has a helper agent running within each user session. The main scheduler works with the agent to make sure the application is launched in the right user session.Disclosure: I work for DssW, who make Power Manager; so feel free to ask technical questions.
If you are concerned about security, consider having the user be switched back to the login window with Fast User Switching.While Fast User Switched, your Mac can wake to schedule, run the AppleScript, and complete its task while not risking unguarded access to the Mac------
What is the difference between account and profile?
The simplest way to think about these two terms is perhaps,Sometimes the two terms are somewhat overlapped.From Wikipedia,A user is a person who uses a computer or network service. A user often has a user account and is identified by a username (also user name). Other terms for username include login name, screen name (also screenname), nickname (also nick), or handle, ...A user profile is a visual display of personal data associated with a specific user, or a customized desktop environment. A profile refers therefore to the explicit digital representation of a person's identity. A user profile can also be considered as the computer representation of a user model. A profile can be used to store the description of the characteristics of person. This information can be exploited by systems taking into account the persons' characteristics and preferences.From Microsoft,
(this is specific to Windows operating system, but the concept is similar to user account and user profile in web programming)A user account is a collection of information that tells Windows which files and folders you can access, what changes you can make to the computer, and your personal preferences, such as your desktop background or screen saver. User accounts let you share a computer with several people, while having your own files and settings. Each person accesses his or her user account with a user name and password.Your user profile is a collection of settings that make the computer look and work the way you want it to. It contains your settings for desktop backgrounds, screen savers, pointer preferences, sound settings, and other features. User profiles ensure that your personal preferences are used whenever you log on to Windows.A user profile is different from a user account, which you use to log on to Windows. Each user account has at least one user profile associated with it.(emphasis added)------
Do I really need an Anti-Virus software if I'm careful about where I browse?
As mentioned in some of the comments, there are no sites which can be guaranteed safe. Even reputable sites have suffered through banner ads, coding mistakes, deliberate attacks etc. so the first problem is that you cannot trust any website. You can work out a level of likelihood of safety by looking at the code from a sandbox and following links, but many attackers write code that hides from debugging tools or from testing environments, and code often changes attack vector with time.So, to the next part - do you need an antivirus? Absolutely - a huge number of machines connected to the Internet are infected and running as part of botnets. If you don't protect your machine it may end up attacking mine. If you cannot detect malware on your machine I would blame your detection techniques, not think that your machine was clean. From SANS, Expected infection time for an unprotected machine on the Internet is sub-5 minutes! (survivaltime is calculated as the average time between reports for an average target IP address ... aka someone pinging your computer would count as an "infection")Sure, AV is only one layer of security (or potentially 2 if you use AV at gateway and desktop) but all layers have value. Any that you miss increases the likelihood of successful compromise------
Password protect MacBook while keeping iTunes running
You'll need to do two things:Steps to configure require password (see this Apple KB):Choose Apple menu > System Preferences, click Security & Privacy, and then click General.Select Require password... after sleep or screen saver begins. You can adjust the amount of delay before a password is required in the pop-up menu.To lock your screen quickly with fast user switching enabled, choose Login Window from the menu with your user name. Your applications will remain open and undisturbed, but your computer islocked.Locking the screen doesnt prevent other users from turning off the computer and restarting it, and then logging in to their own accounts. If you think this could happen, be sure to save your work before you leave your computer.You can set the hot corner (if desired) in the Screen Saver preferences section (see this Apple KB):Use the Screen Saver pane of Desktop & Screen Saver preferences to make images appear on your screen when you arent using your computer. You may want to do this to hide the items on your desktop while youre away.Hot Corners: Click to set a shortcut for starting or deactivating your screen saver. From Active Screen Corners, choose Start Screen Saver or Disable Screen Saver from the pop-up menu for a corner you want to use, and then click OK.
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